Chalk



(No'Model.)

C. G. GOTTSGHALK.

v A 'PREPARING LEATHER. No. 245,488. Patented Aug. 9,1881.

arten STATES PATENT Ormea CHARLES Gr. GOTTSCHALK, JERSEY CITY, NEW JERSEY.

PREPARING LEATHER.

SPECIFICATION forming part of Letters Patent No. 245,480, dated August 9, 1881.

Application tiled J une 17, 1881. (No model.)

To all whom it may concern Be it known that I, CHARLES G. Goms- CHALK, asubject of the Emperor of Germ any, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Preparing Leather, of which the following is a specification.

This invention consists in first dyeing leather and then exposing it to the action of a grinding-stone free from iron, under the presence of moisture, for the purpose of rendering` its surface smooth without impairing its pliability. With the grinding-stone is combined a segmental shield for the purpose of facilitating the operation of grinding.

This invention is illustrated in the accompanying drawings, in which Figure l repre sents a side elevation of the apparatus which I use in carrying out my invention. Fig. 2is a rear view of the same.

Similar letters indicate corresponding parts.

In the manufacture of kid gloves, particularly that class which is known as undress77 kid gloves, the usual practice is to take the skills after the same have been tanned and to dye them with the desired color, and then render their surfaces smooth by the action of a shaving-knife. This operation is very tedious and requires great skill.

In carrying out my invention I use two grinding-stones, A B, one of which is coarse, while the other is fine, so that after the surfaces of the skins have been reduced to a certain degree ot' smoothness by the coarse stone they can be nished in a comparatively short time by the action ofthe second or tine stone. I take the skinsjust as they are taken out of the dye-bath, or, it' they do not contain sufiicient moisture, I saturate them with water, and then I expose them first to the action ot the coarse stone A, and then to the action of the finishing-stone B. Each of these stones is provided with a segmental shield, C, and the workman spreads the skin on the shield ofthe coarse stone A, and while he presses his body l up against it he draws the skin out gradually with his hands and presses it down upon the surface of the grinding-stone, moving it from side to side until the rough portions of the same have been removed. Then he takes the skin to the shield of the finishing-stone B and repeats the operation until the surface of the skin has attained thedesired smoothness, taking care to keep the skin saturated with moisture until the grinding operation is completed. If the skin becomes dry during the grinding operation, its pliability is materially impaired and it cannot be used successfully for gloves If the skin is first ground and then dyed, it must, after the dyeing process, be subjected to an additional smoothingoperation, because by the dyeing process the skin becomes again wrinkled or uneven. By grinding after dyeing the color becomes even throughout the entire skin, and a superior uniform and smooth finish is imparted thereto, lessening labor and diminishing expense. Y

In selecting the grinding-steile great care must be taken to take such stones as are free from iron, and for this reason emery-n-heels cannot be used, because they contain iron, and if theiron comesin contact with the skin in the presence of moisture it produces spots in the skin, which render the same useless. For this reason I prefer to prepare my grinding-stones of cement and pumice-stone or other suitable materials free from iron.

What I claim as new, and desire to secure by Letters Patent, is-

1. The within-described method ot' preparing leather for the manufacture ot' kid gloves and other purposes by dyeing the leather and then exposingit in a moist state first to the action of a coarse stone and then to the action of a nishing-stone, substantially as set loi-th.

2. The combination, with a grinding-stone. ot' a segmental shield, C, substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

C. G. GO"TSCHALK.

Witnesses:

W..HAUFF, E. F. KASTENHUBER. 

